ENMET MX-42A User Manual

Page 9

MX42A C

ONTROL

ENMET Corporation

3.3 Connection of the MX42A Control to the Sensor/Transmitter

3.3.1 Type and Connection of Sensor/Transmitters

Various types of sensor/transmitters can be connected.

Two wire 4-20mA, toxic gas or oxygen detection sensor/transmitters. Such as,

ENMET

SDS

and

models.

Negative in, Signal (wire 1) and Positive in +24 V

(wire 3) of each channel. See figure 4

Three wire 4-20mA combustible or toxic gas and oxygen sensor/transmitters. Such as,

ENMET SDS-97D

and

EX5000

models. Signal (wire 1), DC-

(wire 2) and +24 V

(wire 3). See figure 4

If used with other manufactures sensor/transmitters, follow installation instructions procedures supplied by the
sensor/transmitter manufacturer, or contact your

ENMET

representative or

ENMET

Corporation

Specifications of cable:

•

Using shielded cables is necessary for RFI protection.

•

The shield of the cable must be connected to wire #2 (DC ground) of the

ONTROL

Note:

Labeling on board will appear different then shown in this figure.

Figure 4: Connection of Sensor/Transmitter Terminal

Channel 1

Example: 2 wire 4-20mA

Toxic Gas or Oxygen

Signal ( – )

24V

( + )

Channel 3

Example: 3 wire 4-20mA

Combustible or Toxic Gas

Signal ( – )

24V

( + )

DC-G